Dental hygiene device



FIG. 1 is a top plan view of the novel dental hygiene device;

FIG. 2 is a left side elevation view thereof and the right side elevation view is identical but reversed;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a front elevation view thereof; and,

FIG. 5 is a rear elevation view thereof. 

The ornamental design for a dental hygiene device, as shown and described. 